We Heart Icon our customers

Here's what they say about us

Select a category:

GSA demonstrated exceptional responsiveness to our evolving project demands and organisational needs. Julia adeptly understood our ideas and concepts and effectively captivated prospective leads with her exceptional telephone etiquette and strong communication skills.

The feedback and reporting provided by Kevin and Julia were incredibly insightful, enabling us to explore alternative avenues and make informed strategic choices.

I cannot speak highly enough of GSA for their blend of professionalism and personal touch in their engagement with our company. I wholeheartedly endorse their services.

Jennifer Mainwaring, Business Development Manager

Save Water Save Money

A great positive approach to telemarketing, very open communication, and good results

Bert Spencer, Sales Manager


Targeted approach and clear results. I cannot recommend the GSA team enough!

Egizia-Maria Felice, Marketing Manager GB & IE

Miele Professional

We engaged GSA Marketing to do telemarketing/LinkedIn/Email campaigns for our company. We had a difficult and specific target audience, and GSA worked diligently over a few months to reach these people, and then deliver these campaigns efficiently and effectively. As a result of these campaigns we are now in communications with many of our most desired target leads, well down the long sales cycle that our business necessitates.

I would highly recommend GSA to everyone, I have really enjoyed working with Jonathan, Kevin and Alex. We will be carrying out more campaigns in the new year.

Kate Dela Cruz

Enviro Waste Management

It was a joy working with the team from GSA. The ability to conduct weekly reviews directly with the telemarketers was very reassuring and allowed us to tweak our messages in a timely manner. We are very satisfied not only with the results, but the process and delivery as well.

Mark Gan, Senior Marcom Manager

ITMA Services

We partnered with GSA so we could quickly, professionally, and effectively reach-out to our European customers. GSA enabled us to interact with our client base at a speed with which we would never have been able to replicate using just our in-house language team. We had regular, professional updates with the project team and had thorough and insightful quantitative data, as well as interesting qualitative feedback. It was an enjoyable and successful collaboration.

Clive Gilbert - European Managing Director

International Dance Supplies Ltd

We have worked with GSA for more than 10 years.  Throughout that time they have been simply outstanding.
From a campaign perspective, Kevin and Julia are quite the dream team – Julia’s ability to get to speak to the right individual and put across a compelling message is simply second to none & Kevin’s superb management of the campaign ensures you are fully updated at the click of a button.

Jonathan’s ability to transform our initial email/linked in wording into something that was both meaningful and concise ensured we had a superb hit rate.

We really can’t thank them enough and are already in discussions about our next campaign

Gillian Tait - Managing Director

Competent Adviser

We have known Jonathan and his team at GSA for many years. Having used them on multiple B2B campaigns I can certainty recommend them to any company needing an effective telemarketing company that is focused on results. GSA’s telemarketers have vast experience and the effort they go to understand the product and service is brilliant and shows in the results. Keep up the great work!

Murray Warren, Director


GSA has supported my team over a number of years to deliver high quality leads to our sales teams. Their professional approach from the initial brief through to calling and reporting, fully integrates into our lead generation campaigns.

Marketing Director


We worked with GSA on a B2B marketing campaign following sub-par results using in-house resources. We initially decided on a set number of hours but ended up doubling it after our conversion rate was increased by an amazing 108%. GSA ensured our campaign results were updated on a daily basis and their team followed up with us weekly to ensure the campaign was going as planned. We were impressed with the team’s professional, yet warm manner, making them an absolute pleasure to work with. We look forward to working with GSA in the future.

Michaela Rodgers

Nuclei Group 

The GSA team have been supporting some of our Marketing outreach efforts and we could not be more satisfied with the service. They are great at giving advice, professional in executing campaigns, and efficient in driving results. A real pleasure to work with them


Dr Egizia-Maria Felice. DPhil Marketing Manager

Oxentia Ltd

The team at GSA were extremely helpful and professional, providing advice and thorough explanations on each part of the project we worked with them on. They took the time to meet with us face to face, to discuss the best way to approach the work, and were available to speak to whenever needed. Jonathan is a fountain of knowledge and went above and beyond to help us with any questions we had. It wasn’t the easiest project to work on but GSA helped every step of the way. Thank you!

Amelia Cowan

U+I Global PLC

We were extremely pleased with the activity since we had a large unqualified database that meant our internal team were unable to identify and focus on the best targets for new business development. With the help of GSA, we were able to reach out to prime prospects much more quickly for higher value sales. We would recommend GSA for anyone that wants to generate targeted leads for their business.

Darwin Seidler, Sales Manager, Germany


Fully recommended Jonathan & Kevin and the rest of the GSA team and the service they offer. Very easy to work with and delivered real results for our business despite the campaign being seriously impacted by CV19!

Roy Knappett, Sales & Marketing Director

HTS Spares

Right from the start GSA understood the needs of our cross-Europe tele-research campaign fully & were able to advise and adapt to our specific requirements. The daily reporting helped us understand, first-hand, how the campaign was progressing and help keep costs within the allocated budgets. They were very flexible in terms of the native speakers used as subsequent data was added to the project. I would highly recommend them and will certainly be using them for other projects”

Damian Jackson – Insights Analyst EMEA

OKI Europe Ltd

The Sales team at Ultrimax were impressed with the professional assistance of GSA Business Development, clear visual reporting on a daily basis ensured focused efforts on generating well profiled leads, which helped bolster our ongoing sales growth in 2019. I would recommend GSA Business Development to anyone looking for that extra support in lead generation

Sales Director


GSA are a company with a difference, adding value above what is expected when it comes to telephone campaigns. To be specific about that, we got advice and data cleansing as extras. They are willing to link in with systems and have outstanding reporting. But more than all of that they are transparent so that you know exactly where you stand on a campaign. We would recommend them.

Bruno Beech, Marketing Director

Plus Packaging

GSA allowed us to explore a new vertical and gave us valuable insight into this new market.

They delivered on the campaign goals and we were really impressed with the quality of the calls.


Marketing Manager


We found GSA very professional and helpful when organising our telemarketing campaign, we worked together during the planning and the results were better than expected. We have used them again in a second campaign which also offered good results. The telesales team, was professional and friendly.

Moiz Palaci- Director

FPS Air Compressors Ltd

We decided to use GSA Business Development Ltd to support us with our Christmas Marketing Campaigns. Christmas is an important time of year for us as many organisations use this festive period to award their staff with Love2shop Vouchers and Cards for Christmas Bonuses and Annual Awards. Here at Love2shop Business Services, our peak season begins in October and runs until a few days before Christmas. As a result, the volume of inbound calls meant that we were unable to focus on outbound calling as much as we would have liked to. In the past, we have traditionally used our own resources for outbound calls as we like to stay on brand and ensure our customers receive the best experience possible. However due to the sheer volume of calls which needed to be made, we decided to pitch the business out to a few specialist agencies. From our initial meeting, I knew that GSA were the agency to use as they were smaller and more dynamic than the other agencies we’d spoken to, and in turn, I knew that we’d receive a better, more personal service. We were not disappointed, using a segmented approach, GSA contacted many of our customers and prospects at various stages of the their customer life cycle and generated a great number of quality hot leads for our Business Development Team to follow up. The success from this campaign was not achieved by luck. Processes such as the initial face to face briefing session, hot lead notifications, regular teleconferencing, recorded call listening, weekly reporting and the final post project review meant that we were in constant communication with GSA throughout the 8 week duration of the project. This communication was vital to ensure the calls remained relevant and compliant. As a result of this campaign, I would have no hesitation in recommending GSA Business Development Ltd for any telemarketing requirements.

Robbie Davies

Love2shop Brand Manager

GSA Business Development, was contracted by the Hong Kong Trade Development Council from November 2017 to May 2018 to provide telemarketing services for our GDPR consent campaign in the markets covered by this office.

GSA called a total of 74,000 records and managed to secure a good consent rate. The company was responsive and always willing to listen to our fears and concerns. GSA is a cool-minded and professional TM agency, and I was happy with the results that they obtained.

GSA was awarded the contract on the basis of a competitive tender, and so their costs were reasonable. Thanks to their efforts, we managed to cover our databank before the deadline of 25 May.

I would happily appoint them again. All things being equal.

David Marsden- Director UK, Benelux & Ireland

Hong Kong Trade and Development Council (HKTDC)